Double lock box



Aug. 14, 1928. 1,680,661

L. H. BIRRELL DOUBLE LOCK BOX Filed March 1926 anoewdoc Patented Aug.14, 1928.

UNITED s'rArEs PATENT OFFICE.

LAWRENCE H. BIRRELL, OF SALT LAKE CITY, UTAH, ASSIGNOR F ONE-HALF T0ALEXANDER N. ROSENBAUM, DE LOS ANGELES, CALIFORNIA.

DOUBLE LOCK BOX. 6 j

Application filed March 4, 1926. 7 Serial No. 92,252.

The present invention relates to box construction and more particularlyto boxes constructed of heavy cardboard or the like and designed forcontaining suits, overcoats I or the like.

The primary object of the invention is to construct a box of thischaracter, wherein the tongues formed at the ends of the end portions ofthe box will be securely locked Within slits formed in the side membersof the box and may only be released by bending the side members atpoints adjacent to the slits.

A further object of the invention is the 16 provision of a double locktongue designed to distribute the strain usually directed to the upperportion of the slit in which the tongue is positioned, to the lowerportion of the slit, thereby greatly strengthening the box constructionand adding materially to the wearing qualities of the box.

\Vith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the comination andarrangementof parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of theinvention herein disclosed, may be made within thescope of what is claimed, without departing from the spirit of theinvention. Referring to the drawing: Figure 1 is a diagrammatic view ofa blank of which the box is constructed.

Figure 2 is a fragmental elevational view of one end of the box.

Figure 3 is a fragmental elevational view illustrating the positionstaken by the tongue and side members of the box, when the tongue is tobe removed.

Figure 4 is a perspective view thereof taken from a point within thebox.

Referring to the drawing in detail, the body portion includes a bottom5, side mem bers 6 and end members 7 which when folded upwardly alongthe dotted lines as indicated in Figure 1 will take the form of a box.

Tongues 8 extend laterally from the end members 7, and as shown, eachtongue is formed with an outer inclined edge 9 and an inner inclinededge 10, the inner inclined edge being shorter than the outer inclinededge merges into a substantially straight edge 11 disposed in parallelrelation with the edge 9 for purposes to be hereinafter more fullydescribed. A

The extremity of each tongue is enlarged at 12 and is constructed toprovide shoulders 13 and 14 respectively, which shoulders are adaptedtocooperate with the walls of the slots to lock the tongues againstdisplacement.

Formed in the side members 6 and arranged adjacent to the ends thereof,are slots which include inclined portions 15 that merge into therelatively straight portions 16 disposed in parallel relation with theedges of the side members, there being provided locking slits 17 at theends of the slits 16. I

When the blank is folded to provide a box, the side members are foldedupwardly and the end members are folded upwardly, the end members beingbent so that the tongues will extend inwardly in a manner as shown byFigure 2 of the drawing, whereupon the shoulders 13 will engage withinend members and side members in their upright positions.

Should it be desired to release the tongues from the side members, it isnecessary to bend the box inwardly at its corners, whereupon theenlargements of the tongues are pressed downwardly into engagement withthe bottom of the boxas shown by Figure 4, and the shoulder 13 fallsopposite to the slit 17. By applying pressure at this point slit 17 isopened permitting the tongues to slide under portion A and be released.

I claim:

A foldable box blank including a. rectangular body portion, said bodyportion having horizontal. slits disposed in parallel relation with theside edges thereof, said body portion having substantially short intothe first mentioned slits at points intertioned slits, the upper cornersof the tongues mediate the ends thereof, end members eX- being disposedwithin the locking slits when tending from the ends of the blank,tongues the sides and ends are bent upwardly in the 10 extending fromthe side edges of the end formation of a box.

members, said tongues having inclined edges In testimony that I claimthe foregoing as defining shoulders, and corners, said tongues my own, Ihave hereto aflixed my signature.

adapted to be positioned in the first men- LAWRENCE H. BlRRELL.

